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Room-temperature multi-self-crosslinked core-shell type copolymer emulsion as well as preparation method and application thereof

A polymer emulsion and self-crosslinking technology, which is applied in coatings, anti-corrosion coatings, etc., can solve problems such as poor anti-corrosion performance and poor compactness of coating films

Active Publication Date: 2017-10-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of poor compactness and poor anti-corrosion performance of water-based metal anti-corrosion coatings, the present invention synthesized a room-temperature self-crosslinking core-shell copolymer emulsion

Method used

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  • Room-temperature multi-self-crosslinked core-shell type copolymer emulsion as well as preparation method and application thereof
  • Room-temperature multi-self-crosslinked core-shell type copolymer emulsion as well as preparation method and application thereof
  • Room-temperature multi-self-crosslinked core-shell type copolymer emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] nuclear reaction:

[0027] (1) Add 31kg of deionized water, 0.21kg of emulsifier SE-10N, and 0.105kg of emulsifier TX-30 into the reaction kettle. After stirring and dissolving, add 1kg of styrene, 1kg of butyl acrylate, and 0.08kg of diacetone acrylamide, Mechanical stirring was used to obtain a pre-emulsion. Dissolve 63g of initiator ammonium persulfate in 1kg of deionized water to obtain 1063g of initiator aqueous solution for later use, adjust the temperature to 80°C, add 106.3g of initiator aqueous solution to the reaction kettle dropwise within 15min, and wait for the system to turn blue, keep it warm for 30min, as Seed lotion.

[0028] (2) Mix 4kg styrene, 4kg butyl acrylate, and 0.32kg diacetone acrylamide to obtain a monomer mixture, and simultaneously add 425.2g of initiator aqueous solution and monomer mixture to the seed emulsion of step (1) reactor In the middle, control the dropwise addition in 1-2h, and keep warm for 1h after the addition.

[0029] She...

example 2

[0032] In this embodiment, the emulsifier 0.21kg SE-10N and 0.105kg TX-30 in step (1) of Example 1 are replaced by 0.252kg SE-10N and 0.126kg TX-30. The rest are the same as Example 1.

example 3

[0034] In this embodiment, SE-10N is replaced by SR-10, and the rest is the same as Example 1.

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Abstract

The invention relates to a room-temperature multi-self-crosslinked core-shell type copolymer emulsion as well as a preparation method and application thereof and belongs to the field of high molecular materials. The preparation method comprises the following steps: reacting by taking 15-35 parts of hard monomers, 15-35 parts of soft monomers and 1-2 parts of diacetone acrylamide as core layer monomers, and a reaction / non-reaction type emulsifying agent and 0.1-0.3 part of persulfate as an initiator at 60-90 DEG C through a seeded emulsion polymerization process, so as to obtain a core layer copolymer emulsion; and on the basis, reacting by taking 15-35 parts of the hard monomers, 15-35 parts of the soft monomers, 1-5 parts of acrylic acid phosphate, 1-2 parts of acrylamide monomers and 1-2 parts of vinyl alkoxy silane as shell layer monomers and persulfate as an initiator at 60-90 DEG C, so as to obtain the good-stability room-temperature multi-self-crosslinked core-shell type copolymer emulsion. By adding various functional aids, a water-based anticorrosive coating is prepared. After a steel plate is coated, self-crosslinking is realized during the drying of a paint film, and an obtained coating layer has good corrosion resistance.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a room temperature multiple self-crosslinking core-shell copolymer emulsion and its preparation method and application. technical background [0002] Commonly used metal anti-corrosion coatings are mostly solvent-based, and the dispersion medium is an organic solvent, mostly xylene, gasoline, etc. During the drying process, the solvent volatilizes into the air, causing serious pollution and endangering human health. Water-based coating is an effective way to solve this problem. Water-based acrylic polymer emulsion is a polymer system obtained by free radical polymerization of various monomers with vinyl groups. Unlike two-component coatings, acrylic emulsion can form itself Membrane, used as a one-component coating, is more convenient and easy to operate in construction. [0003] However, in the field of metal anti-corrosion coatings, due to factors such as the water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/58C08F220/14C08F265/06C09D151/00C09D5/08
CPCC08F212/08C08F220/14C08F220/18C08F220/1804C08F265/06C09D5/08C09D151/003C08F220/58
Inventor 李效玉李宇何立凡
Owner BEIJING UNIV OF CHEM TECH
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